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commit c533244b8e00ae701583ec50aeb43377d292452d
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Mon Feb 4 20:07:18 2019 +0100
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nscd: Do not use __inet_aton_exact@GLIBC_PRIVATE [BZ #20018]
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This commit avoids referencing the __inet_aton_exact@GLIBC_PRIVATE
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symbol from nscd. In master, the separately-compiled getaddrinfo
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implementation in nscd needs it, however such an internal ABI change
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is not desirable on a release branch if it can be avoided.
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(Note: This commit was backported from the release/2.28/master branch.)
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diff --git a/nscd/Makefile b/nscd/Makefile
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index 2dc98d3a3347f998..62f38fa824527e0a 100644
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--- a/nscd/Makefile
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+++ b/nscd/Makefile
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@@ -36,7 +36,7 @@ nscd-modules := nscd connections pwdcache getpwnam_r getpwuid_r grpcache \
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getsrvbynm_r getsrvbypt_r servicescache \
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dbg_log nscd_conf nscd_stat cache mem nscd_setup_thread \
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xmalloc xstrdup aicache initgrcache gai res_hconf \
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- netgroupcache
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+ netgroupcache nscd-inet_addr
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ifeq ($(build-nscd)$(have-thread-library),yesyes)
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diff --git a/nscd/gai.c b/nscd/gai.c
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index dbe878fcf699dbc1..e7443904b4514836 100644
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--- a/nscd/gai.c
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+++ b/nscd/gai.c
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@@ -32,6 +32,12 @@
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/* nscd uses 1MB or 2MB thread stacks. */
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#define __libc_use_alloca(size) (size <= __MAX_ALLOCA_CUTOFF)
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+/* We do not want to export __inet_aton_exact. Get the prototype and
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+ change its visibility to hidden. */
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+#include <arpa/inet.h>
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+__typeof__ (__inet_aton_exact) __inet_aton_exact
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+ __attribute__ ((visibility ("hidden")));
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+
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/* We are nscd, so we don't want to be talking to ourselves. */
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#undef USE_NSCD
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diff --git a/nscd/nscd-inet_addr.c b/nscd/nscd-inet_addr.c
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new file mode 100644
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index 0000000000000000..f366b9567d914f99
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--- /dev/null
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+++ b/nscd/nscd-inet_addr.c
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@@ -0,0 +1,32 @@
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+/* Legacy IPv4 text-to-address functions. Version for nscd.
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+ Copyright (C) 2019 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <arpa/inet.h>
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+
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+/* We do not want to export __inet_aton_exact. Get the prototype and
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+ change the visibility to hidden. */
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+#include <arpa/inet.h>
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+__typeof__ (__inet_aton_exact) __inet_aton_exact
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+ __attribute__ ((visibility ("hidden")));
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+
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+/* Do not provide definitions of the public symbols exported from
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+ libc. */
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+#undef weak_alias
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+#define weak_alias(from, to)
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+
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+#include <resolv/inet_addr.c>
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